The most useful feature is automatic integration of our website as new products are launched in our store - this saves a lot of time for all team members! It's great if you have more than one customer or use multiple platforms like Slack/Facebook etc at once - then there can be some problems when they try to access your page (for example slack).
At first I had no idea what Saasler was about but now I see how helpful it would make my work easier. We don't need an extra tool because we already integrate everything manually using Zapier so far. This way we've saved many hours compared to doing things manually which also enabled us not only track customers who signed up from different channels better but also do A / B testing without having to wait until after launch.